Ind. Code § 21-35-3-4

Sec. 4. This chapter may not be construed to affect the validity of any contracts executed before March 10, 1965, or the validity of any bonds contracted to be sold before March 10, 1965. This chapter does not apply to any facilities approved by the budget agency or any predecessor of the budget agency and the governor before March 10, 1965, or to any facilities for which temporary or interim financing commitments were made before March 10, 1965, or to the issuance of bonds for any such facilities.